Abstract: An electronic device with a calendar function having an input device, so that a desired date can be entered in the electronic device. The day of the week that January 1st falls on in the year corresponding to the desired date is determined. The ordinal number of a week in which the entered desired date falls is determined dependent on the day January 1st falls on. For example, if January 1st is between a first day of the week and a fourth day of the week, the week corresponding to January 1st is deemed as the first week in the year, if January 1st is between a fifth day and a seventh day of the week, the week following the week to which January 1st belongs is deemed as the first week of the year. A display is provided displaying the ordinal number of the week of the year in which the entered desired date falls.

Abstract: An electronic device is provided with a calendar function such that it is possible to display one or more schedules. The electronic device includes an input device which receives data representing starting and ending times. This data is displayed in graphic format to illustrate the starting and ending times of the schedule.

Abstract: An electronic world clock device indicates a time in connection with a designated region based on a time difference in a reference region to be stored, and comprises clock means for counting a present time in a specified home region and memory means for storing various regions and names of the countries and the time differences corresponding to said various regions in the world, and said designated region and the name of the country where said designated region belongs are stored at the same time, so that said designated region as well as the name of the corresponding country and/or a time difference between two different regions in the world are indicated at the same time on the basis of the time difference in said reference region.

Abstract: An asset control device comprising an input keyboard for entering information of transactions including the amount of a check and that of deposit, a current balance storage, an opening balance storage, a transaction storage for registering the serial number of a check and the amount thereof each time the check is drawn or the amount of money deposited each time the deposit of money is effected, a calculator operable to subtract the amount of check stored in the transaction storage from the opening balance or to add the amount of the deposited money stored in the transaction storage to the opening balance, and a display unit for sequentially displaying the transaction information and the result of calculation performed by the calculator.

Abstract: An electronic bookkeeping device is useful in association with use of credit cards for controlling use of various credit cards. The device stores data relative to the extent of use of each card, and assists a user in making the most effective use of a plurality of credit cards.

Abstract: An electronic learning aid includes a circuit for automatically developing problems, a display for displaying the problems, an input for introducing a calculated answer, and a determination circuit for detecting whether the introduced answer is correct. The display includes a first display unit of plural digits for displaying the problems, and a second display unit of plural digits for displaying the problem number, the score, the correct answer number, and the exercise number.

Abstract: An electronic learning aid is disclosed, which automatically develops and displays problems, and functions to compare an answer introduced by a student with a correct answer stored in the electronic learning aid. A mode selection switch is provided for selectively placing the electronic learning aid in an exercise mode and in an examination (test) mode. In the exercise mode, a symbol display is energized for displaying information as to whether the introduced answer is correct or not upon every introduction of the answer by the student. In the examination (test) mode, the symbol display is not conducted, and a percentage score is displayed after completion of a series of problems.